Personal cleansing compositions with increased deposition of polyacrylate microcapsules

ABSTRACT

A personal cleansing composition that increases the deposition and retention of benefit agent containing polyacrylate microcapsules onto hair and/or skin. The personal cleansing composition is based on the combination of anionic charged polyacrylate microcapsules, cationic deposition polymers, detersive surfactant, and a carrier.

CROSS REFERENCE TO RELATED APPLICATION

This application claims the benefit of U.S. Provisional Application Ser.No. 61/472,882 filed Apr. 7, 2011.

FIELD OF THE INVENTION

The present invention relates to personal cleansing compositionscontaining polyacrylate microcapsules, wherein the polyacrylatemicrocapsules have increased deposition onto hair and/or skin.

BACKGROUND OF THE INVENTION

Many of the personal cleansing products in the market today work todeliver benefits to hair and/or skin by depositing benefit agents suchas perfumes, moisturizers, and skin care agents onto the desired situs.As a result, there is a desire to maximize the effectiveness of suchbenefit agents by increasing their delivery and retention. One method ofachieving this objective is to encapsulate such benefit agents inmicrocapsules. While these microcapsules are able to encapsulate a widevariety of benefit agents and deliver them to the desired situs, it isstill difficult to improve the retention and delivery efficiencies ofsuch benefit agents. Such agents may be lost due to the agents' physicalor chemical characteristics, or such agents may be incompatible withother compositional components or the situs that is being treated.Consumers today desire personal cleansing compositions that deposit andretain encapsulated benefit agents onto hair and/or skin, even after anextended period of time.

One known method for improving the deposition of microcapsules onto thesitus during treatment involves the use of certain cationic depositionpolymers. However, this alone does not necessarily ensure adequatedeposition of microcapsules.

Accordingly, there is a need for a personal cleansing composition thatprovides an increased deposition of encapsulated benefit agents. Inaddition, there is a need for a polymer system that associates withmicrocapsule surfaces, and that when sheared, allows the encapsulatedbenefit agents to be released. Furthermore, there is a need for apersonal cleansing composition that provides an increased retention ofencapsulated benefit agents onto the situs for an extended period oftime.

SUMMARY OF THE INVENTION

A personal cleansing composition comprising: from about 0.001% to about10% of an anionic charged polyacrylate microcapsule; from about 0.01% toabout 2% of a cationic deposition polymer; from about 2% to about 50% ofa detersive surfactant; and a carrier.

A method of making a personal cleansing composition, wherein thecomposition is formed by a process comprising the steps of: coating apolyacrylate microcapsule with an anionic emulsifier to form an anionicpolyacrylate microcapsule; combining the anionic polyacrylatemicrocapsule with a cationic deposition polymer to form a premix; addingthe premix to a detersive composition comprising surfactant and acarrier.

A method of making a personal cleansing composition, wherein thecomposition is formed by a process comprising the steps of: coating apolyacrylate microcapsule with an anionic emulsifier to form an anionicpolyacrylate microcapsule; combining the anionic polyacrylatemicrocapsule with a cationic deposition polymer to form a premix; addingthe premix to an anionic surfactant; adding the resulting composition ofstep (c) to a detersive composition comprising surfactant and a carrier.

DETAILED DESCRIPTION OF THE INVENTION

In all embodiments of the present invention, all percentages are byweight of the total composition, unless specifically stated otherwise.All ratios are weight ratios, unless specifically stated otherwise. Allranges are inclusive and combinable. The number of significant digitsconveys neither a limitation on the indicated amounts nor on theaccuracy of the measurements. All numerical amounts are understood to bemodified by the word “about” unless otherwise specifically indicated.Unless otherwise indicated, all measurements are understood to be madeat 25° C. and at ambient conditions, where “ambient conditions” meansconditions under about one atmosphere of pressure and at about 50%relative humidity. All such weights as they pertain to listedingredients are based on the active level and do not include carriers orby-products that may be included in commercially available materials,unless otherwise specified.

DEFINITIONS

As used herein, the term “personal cleansing composition” includes,unless otherwise indicated, any personal cleansing composition that canbe applied to the keratinaceous surfaces of the body including the skinand/or hair. The personal cleansing compositions can be, for example,formulated as cleaning bars, liquids, emulsions, shower gels, powders,sticks, pastes, mouthwashes, foam baths, shave prep products, anddevices used for shaving.

As used herein, the term “fluid” includes liquids and gels.

As used herein, the terms “microcapsule,” “encapsulated benefit agents,”and “solid particulates,” refers to polyacrylate microcapsules.

As used herein, the term “premix” refers to the combination of anionicpolyacrylate microcapsules with cationic deposition polymers.

As used herein, the term “situs” includes hair and skin.

As used herein, the articles including “a” and “an” when used in aclaim, are understood to mean one or more of what is claimed ordescribed.

As used herein, the terms “include,” “includes,” and “including,” aremeant to be non-limiting.

The test methods disclosed in the Test Methods Section of the presentapplication should be used to determine the respective values of theparameters of Applicants' inventions.

Unless otherwise noted, all component or composition levels are inreference to the active portion of that component or composition, andare exclusive of impurities, for example, residual solvents orby-products, which may be present in commercially available sources ofsuch components or compositions.

All percentages and ratios are calculated by weight unless otherwiseindicated. All percentages and ratios are calculated based on the totalcomposition unless otherwise indicated.

It should be understood that every maximum numerical limitation giventhroughout this specification includes every lower numerical limitation,as if such lower numerical limitations were expressly written herein.Every minimum numerical limitation given throughout this specificationwill include every higher numerical limitation, as if such highernumerical limitations were expressly written herein. Every numericalrange given throughout this specification will include every narrowernumerical range that falls within such broader numerical range, as ifsuch narrower numerical ranges were all expressly written herein.

Benefits of Anionic Polyacrylate Microcapsules

Consumers desire personal cleansing compositions that deposit and retainencapsulated benefit agents onto their hair and/or skin during thecleansing process. Traditionally, a variety of approaches have beenemployed to improve deposition of microcapsules, including (1) usingspecific block copolymers to covalently bind to the microcapsules, and(2) using cationic water soluble polymers to coat the microcapsules inorder to increase the affinity of the microcapsules to the substrate ofinterest. However, it is desired to have improved deposition over thetraditional approaches.

It has been surprisingly found that a synergy exists between anionicemulsifiers and polyacrylate microcapsules, resulting in anionicpolyacrylate microcapsules. When such anionic microcapsules are mixedwith cationic deposition polymers, microstructures are formed at thesurface of the anionic polyacrylate. Such anionic microstructuresdisplay high viscoelasticity, remain in tact even upon dilution duringcleansing, and display strong adhesion to keratinaceous hair and/or skinsurfaces. Combined with cleansing compositions, these properties resultin improved delivery efficiency of the encapsulated benefit agents tohair and/or skin.

It is believed that the personal cleansing compositions comprisinganionic polyacrylate microcapsules, along with specific cationicdeposition polymers, delivers a higher deposition rate than personalcleansing compositions containing non-anionic polyacrylates. Inaddition, anionic polyacrylate microcapsules with specific cationicdeposition polymers also have a higher retention rate on the situs evenover an extended period of time. Applicants surprising discovery ofadding anionic emulsifier to microcapsules to form anionic microcapsulescan be accomplished by either: (1) adding the anionic emulsifier to analready formed microcapsule or (2) allowing the anionic emulsifier toassociate with the microcapsule surface during the microcapsule makingprocess. Once formed, the anionic polyacrylate microcapsules arecombined with the specific cationic polymer(s) chosen to form a premixfor addition to an anionic surfactant containing personal cleansingcomposition.

Anionic Emulsifier

The addition of an anionic emulsifier forms a microstructure with aspecified cationic deposition polymer at the external surface of themicrocapsules, i.e., the anionic emulsifier is at least a part of theexternal surface of the microcapsules, or is physically or chemicallybound to the external surface of the microcapsules. Such physicalbindings include, for example, hydrogen bonding, ionic interactions,hydrophobic interactions, and electron transfer interactions. Suchchemical bindings include, for example, covalent bindings such ascovalent grafting and crosslinking.

The anionic emulsifier is present at a level by weight of from about0.1% to about 40%, from about 0.5% to about 10%, or from about 0.5% toabout 5%, by weight of the polyacrylate microcapsule.

A variety of anionic emulsifiers can be used in the personal cleansingcomposition of the present invention as described below. The anionicemulsifiers include, by way of illustrating and not limitation,water-soluble salts of alkyl sulfates, alkyl ether sulfates, alkylisothionates, alkyl carboxylates, alkyl sulfosuccinates, alkylsuccinamates, alkyl sulfate salts such as sodium dodecyl sulfate, alkylsarcosinates, alkyl derivatives of protein hydrolyzates, acylaspartates, alkyl or alkyl ether or alkylaryl ether phosphate esters,sodium dodecyl sulphate, phospholipids or lecithin, or soaps, sodium,potassium or ammonium stearate, oleate or palmitate, alkylarylsulfonicacid salts such as sodium dodecylbenzenesulfonate, sodiumdialkylsulfosuccinates, dioctyl sulfosuccinate, sodiumdilaurylsulfosuccinate, poly(styrene sulfonate) sodium salt,isobutylene-maleic anhydride copolymer, gum arabic, sodium alginate,carboxymethylcellulose, cellulose sulfate and pectin, poly(styrenesulfonate), isobutylene-maleic anhydride copolymer, gum arabic,carrageenan, sodium alginate, pectic acid, tragacanth gum, almond gumand agar; semi-synthetic polymers such as carboxymethyl cellulose,sulfated cellulose, sulfated methylcellulose, carboxymethyl starch,phosphated starch, lignin sulfonic acid; and synthetic polymers such asmaleic anhydride copolymers (including hydrolyzates thereof),polyacrylic acid, polymethacrylic acid, acrylic acid butyl acrylatecopolymer or crotonic acid homopolymers and copolymers,vinylbenzenesulfonic acid or 2-acrylamido-2-methylpropanesulfonic acidhomopolymers and copolymers, and partial amide or partial ester of suchpolymers and copolymers, carboxymodified polyvinyl alcohol, sulfonicacid-modified polyvinyl alcohol and phosphoric acid-modified polyvinylalcohol, phosphated or sulfated tristyrylphenol ethoxylates.

In addition, it is desirable to use anionic emulsifiers that haveacrylate functionality since these can be covalently linked to the shellportion of the polyacrylate microcapsules during the microcapsule makingprocess. Anionic emulsifiers useful herein include, but aren't limitedto: poly(meth)acrylic acid; copolymers of (meth)acrylic acids and its(meth)acrylates with C1-22 alkyl, C1-C8 alkyl, butyl; copolymers of(meth)acrylic acids and (meth)acrylamide; Carboxyvinylpolymer; acrylatecopolymers such as Acrylate/C10-30 alkyl acrylate crosspolymer, Acrylicacid/vinyl ester copolymer/Acrylates/Vinyl Isodecanoate crosspolymer,Acrylates/Palmeth-25 Acrylate copolymer, Acrylate/Steareth-20 Itaconatecopolymer, and Acrylate/Celeth-20 Itaconate copolymer; Polystyrenesulphonate, copolymers of methacrylic acid and acrylamidomethylpropanesulfonic acid, and copolymers of acrylic acid andacrylamidomethylpropane sulfonic acid; carboxymethycellulose; carboxyguar; copolymers of ethylene and maleic acid; and acrylate siliconepolymer. Neutralizing agents may be included to neutralize the anionicemulsifiers herein. Non-limiting examples of such neutralizing agentsinclude sodium hydroxide, potassium hydroxide, ammonium hydroxide,monoethanolamine, diethanolamine, triethanolamine, diisopropanolamine,aminomethylpropanol, tromethamine, tetrahydroxypropyl ethylenediamine,and mixtures thereof. Commercially available anionic emulsifiersinclude, for example, Carbomer supplied from Noveon under the tradenameCarbopol 981 and Carbopol 980; Acrylates/C10-30 Alkyl AcrylateCrosspolymer having tradenames Pemulen TR-1, Pemulen TR-2, Carbopol1342, Carbopol 1382, and Carbopol ETD 2020, all available from Noveon;sodium carboxymethylcellulose supplied from Hercules as CMC series; andAcrylate copolymer having a tradename Capigel supplied from Seppic. Inanother embodiment, anionic emulsifiers are carboxymethylcelluloses.

Polyacrylate Microcapsules

Various processes for microencapsulation, and exemplary methods andmaterials, are set forth in U.S. Pat. No. 6,592,990; U.S. Pat. No.2,730,456; U.S. Pat. No. 2,800,457; U.S. Pat. No. 2,800,458; and U.S.Pat. No. 4,552,811. Each patent described throughout this application isincorporated herein by reference to the extent each provides guidanceregarding microencapsulation processes and materials.

The present invention teaches a low permeability microcapsule comprisinga core material and a wall material at least partially surrounding, andin one embodiment, completely surrounding, a core material. In thepresent invention, the polyacrylate microcapsules are benefit agentmicrocapsule particulates which encapsulate benefit agents by capsulewall materials comprised of polymers.

Capsule wall materials useful herein include, for example, those formedfrom melamine-formaldehyde or urea-formaldehyde condensates,melamine-resorcinol or urea-resorcinol condensates, as well as similartypes of aminoplasts, gelatin, polyurethane, polyamide, polyolefin,polysaccaharide, protein, silicone, lipid, modified cellulose, gums,polyacrylate, polyphosphate, polystyrene, and polyesters, orcombinations of these materials. In another embodiment, a wall materialthat provides low permeability is polyacrylate.

The benefit agents of the core may comprise a material selected from thegroup consisting of perfumes; brighteners; enzymes; perfumes; skin careagents, conditioning agents, moisturizers, thickeners; anti-microbialagents; sensates in one aspect a cooling agent; attractants, in oneaspect a pheromone; anti-bacterial agents; dyes; pigments; bleaches; andmixtures thereof.

The present invention may further comprise one or more anti-fungal oranti-microbial actives. When present, the antimicrobial bar compositioncan include from about 0.001% to about 5%, in another embodiment fromabout 0.01% to about 1.5%, and in another embodiment from about 0.1% toabout 1%, by weight of the personal cleansing composition, of theantibacterial agents. Examples of antimicrobial agents that can be usedherein include a pyrithione or a polyvalent metal salt of pyrithionesuch as a zinc salt of 1-hydroxy-2-pyridinethione (known as “zincpyrithione” or “ZPT”), carbanilides, for example, triclocarban (alsoknown as trichlorocarbanilide), triclosan, a halogenated diphenyletheravailable as DP-300 from Ciba-Geigy, hexachlorophene,3,4,5-tribromosalicylanilide, and salts of 2-pyridinethiol-1-oxide,salicylic acid and other organic acids. Other suitable antimicrobialagents are described in detail in U.S. Pat. No. 6,488,943 (referred toas antimicrobial actives).

The polyacrylate microcapsules useful herein are those releasing thebenefit agents for a period of time after initial application. Potentialtrigger mechanisms for release of the encapsulated benefit agents mayinclude, but are not limited to, mechanical forces, dehydration, light,pH, temperature, or even changes in ionic strength.

Process of Making Anionic Polyacrylate Microcapsules

An anionic polyacrylate microcapsule can be formed by either: (1)coating an already formed microcapsule with an anionic emulsifier; or(2) adding the anionic emulsifier to the microcapsule during themicrocapsule making process. Any known method for generating amicrocapsule is useful herein. Example methods for making polyacrylatemicrocapsules are disclosed in U.S. Patent Application 61/328,949; U.S.Patent Application 61/328,954; U.S. Patent Application 61/328,962; andU.S. Patent Application 61/328,967.

In one embodiment, polyacrlyate microcapsules are formed from water inoil, or oil in water emulsifications. During the polyacrylatemicrocapsule making process, a first composition is prepared as an oilphase. The oil phase may comprise oil; an oil soluble or dispersibleprimary, secondary, or tertiary amine; a multifunctional acrylate ormethacrylate monomer or oligomer; an oil soluble acid; an initiator, andcombinations thereof. In one embodiment, a nitrogen blanket is employedwhile the solution is mixed. Gradually, the temperature is increased tocreate a first composition reaction product. After the first compositionreaction product is formed, a second composition is added to thereaction product.

The second composition is prepared as a water phase. The water phase maycomprise water; an emulsifier that may be water soluble or waterdispersible polymer or copolymer; at least one water phase initiator;one or more of an alkali or alkali salt, and combinations thereof. Bywater phase initiator, it is meant that the initiator is soluble ordispersible in water.

The second composition is then added to the oil solution of the firstcomposition reaction product. This addition creates an oil-in-wateremulsion. The reaction of the first composition in the presence of thesecond composition results in the formation of a low permeabilitymicrocapsule wall. The emulsion is further heated for a time andtemperature sufficient to decompose the free radicals which are presentin either one or both of the oil and water phases.

Furthermore, the polymerization of the monomers and oligomers in the oilphase causes a precipitation of the polymerized material. Theprecipitation of microcapsule wall material forms at the interface ofthe water and oil phases.

The anionic polyacrylate microcapsule is contained in the composition ata level by weight of from about 0.01% to about 50%, from about 0.05% toabout 10%, from about 0.1% to about 8%, or from about 0.25% to 3%.

The anionic polyacrylate microcapsules useful herein are those having aparticle size of from about 1 micron to about 80 microns, from about 2microns to about 50 microns, and from about 5 microns to about 30microns.

A. Coating a Microcapsule

In one embodiment of the invention, the anionic emulsifier is added toan already formed polyacrylate microcapsule. The anionic emulsifierattaches to the surface of the microcapsule through hydrogen bonding,van der Waals forces, ionic interactions, hydrophobic interactions, orchemical reactions. In one aspect, the anionic emulsifier surrounds atleast a part of the external surface of the polyacrylate microcapsule,or is physically or chemically bound to the external surface of thepolyacrylate microcapsule.

B. Adding Anionic Emulsifier to a Microcapsule

In another embodiment, the anionic emulsifier associates with themicrocapsule surface during the microcapsule making process. When makingthe microcapsule, the anionic emulsifier is solubilized in an aqueousphase, which may optionally contain a free radical initiator, prior toemulsification of the oil. The excess aqueous phase is then added to theoil phase to form an oil-in-water emulsion. The emulsion is then heatedfor a time and at a temperature sufficient to decompose the freeradicals which are positioned in one or both of the oil and aqueousphases. Microcapsule wall material is thereby formed at the interface ofthe water and oil phases. In one embodiment, when the emulsifier iscomprised of acrylate moieties, the emulsifier may become chemicallybound to the interfacial wall material.

C. Forming the Premix

Once the anionic polyacrlyate microcapsule is formed by either formationstep, the anionic polyacrylate microcapsule is added to a specificcationic deposition polymer to form a premix. It has been surprisinglyfound that the anionic charge on the polyacrylate microcapsule leads tothe formation of a microstructure on the shell of the microcapsule whencombined with a cationic deposition polymer in the premix. This premixexhibits anionic polyacrylate microcapsules that have a higherviscoelasticity to the hair and/or skin than microcapsules without ananionic charge and specific cationic deposition polymer thus giving abenefit to the situs.

Slurry/Aggolmerate

In one embodiment, the anionic polyacrylate microcapsules are containedin a slurry. The slurry may be combined with an adjunct ingredient toform a composition, for example, a conditioning consumer product.

In one aspect, the slurry may comprise one or more processing aids,selected from the group consisting of water, aggregate inhibitingmaterials such as divalent salts; particle suspending polymers such asxanthan gum, guar gum, and caboxy methyl cellulose. In anotherembodiment, said processing aids may be selected from the groupconsisting of amphoteric surfactants such as cocamidopropyl betaine(CAPB), zwitterionic surfactants, cationic swellable polymers, latexparticles such as acrylic based ester Rheovis CDE, and mixtures thereof.

In one aspect, the slurry may comprise a carrier selected from the groupconsisting of polar solvents, including but not limited to, water,ethylene glycol, propylene glycol, polyethylene glycol, glycerol;nonpolar solvents, including but not limited to, mineral oil, perfumeraw materials, silicone oils, hydrocarbon paraffin oils, and mixturesthereof.

In another embodiment, the anionic polyacrylate microcapsules arecontained in an agglomerate with a second material. In one aspect, saidsecond materials may comprise a material selected from the groupconsisting of silicas, citric acid, sodium carbonate, sodium sulfate,sodium chloride, and binders such as sodium silicates, modifiedcelluloses, polyethylene glycols, polyacrylates, polyacrylic acids,zeolites and mixtures thereof.

Cationic Deposition Polymer

The personal cleansing composition of the present invention comprises acationic deposition polymer that forms a premix when added to theanionic polyacrylate microcapsules. Any known natural or syntheticcationic deposition polymer can be used herein. Examples include thosepolymers disclosed in U.S. Pat. No. 6,649,155; U.S. patent applicationSer. No. 12/103,902; U.S. Patent Publication 2008/0206355; and U.S.Patent Publication No. 2006/0099167A1.

The cationic deposition polymer is included in the composition at alevel from about 0.01% to about 2%, in one embodiment from about 1.5% toabout 1.9%, in another embodiment from about 1.8% to about 2.0%, in viewof providing the benefits of the present invention.

The cationic deposition polymer is a water soluble polymer with a chargedensity from about 0.5 milliequivalents per gram to about 12milliequivalents per gram. The cationic deposition polymer used in thecomposition has a molecular weight of about 100,000 Daltons to about5,000,000 Daltons. The cationic deposition polymer is a low chargedensity cationic polymer.

In one embodiment, the cationic deposition polymer is a syntheticcationic deposition polymer. A variety of synthetic cationic depositionpolymers can be used including mono- and di-alkyl chain cationicsurfactants. In one embodiment, mono-alkyl chain cationic surfactantsare chosen including, for example, mono-alkyl quaternary ammonium saltsand mono-alkyl amines. In another embodiment, di-alkyl chain cationicsurfactants are used and include, for example, dialkyl (14-18) dimethylammonium chloride, ditallow alkyl dimethyl ammonium chloride,dihydrogenated tallow alkyl dimethyl ammonium chloride, distearyldimethyl ammonium chloride, dicetyl dimethyl ammonium chloride, andmixtures thereof.

In another embodiment, the cationic deposition polymer is a naturallyderived cationic polymer. The term, “naturally derived cationic polymer”as used herein, refers to cationic deposition polymers which areobtained from natural sources. The natural sources may be polysaccharidepolymers. Therefore, the naturally derived cationic polymer may beselected from the group comprising starches, guar, cellulose, Cassia,locust bean, Konjac, Tara, galactomannan, tapioca, and syntheticpolymers. In a further embodiment, cationic deposition polymers areselected from Mirapol 100S (Rhodia), Jaguar C17, polyDADMAC, Tapiocastarch (Akzo), polyTriquat, and mixtures thereof.

Forming a Premix

The cationic deposition polymer and the anionic polyacrylatemicrocapsule are mixed to form a premix before addition to the personalcleansing composition comprising a detersive surfactant and a carrier.

The weight ratio of the anionic polyacrylate microcapsule to thecationic deposition polymer (based on the dry weight of the anionicmicrocapsules and the dry weight of the cationic deposition polymer) isfrom about 0.5:30 to about 20:1, from about 5:15 to about 15:1, and fromabout 5:1 to about 12:1. It is believed that too much cationic polymermay not provide enhanced and/or prolonged benefits to the benefit agentmicrocapsules due to the formation of excess cationic polymer coating onthe capsule wall. This excess coating may prevent the microcapsule wallfrom breaking and releasing the benefit agents.

Microcapsules and anionic emulsifiers may be dispersed in solvents suchas water while mixing with the cationic deposition polymer. In oneembodiment, the amount of water present is from about 90% to about 50%,in another embodiment from about 70% to about 50%, and in anotherembodiment from about 60% to about 50%. In one embodiment of theinvention, the anionic emulsifiers associate with the microcapsule wallsto form anionic polyacrylate microcapsules prior to their mixing withcationic deposition polymers.

Detersive Composition

The detersive composition can be all aqueous phase or may comprise bothan oil phase and an aqueous phase. In one embodiment, the detersivecomposition has both an oil phase and an aqueous phase. After beingadded to the detersive composition, the polyacrylate microcapsulesreside in the aqueous phase of such embodiments.

The detersive composition may comprise any combination of the followingcomponents:

A. Detersive Surfactant

The personal cleansing composition of the present invention includes adetersive surfactant. The detersive surfactant provides cleaningperformance to the composition. The detersive surfactant in turncomprises anionic, nonionic, cationic, zwitterionic, amphotericsurfactants, soap, or combinations thereof. Various examples anddescriptions of detersive surfactants are set forth in U.S. Pat. No.6,649,155; U.S. patent application Ser. No. 12/103,902; and U.S. PatentPublication 2008/0206355, and are incorporated herein for reference.

The concentration of the anionic surfactant component in the cleansingcomposition should be sufficient to provide the desired cleaning andlather performance, and generally ranges from about 2% to about 50%,from about 8% to about 30%, from about 10% to about 25%, or from about12% to about 22%.

For example, according to one embodiment, the surfactant can compriseone or more linear anionic surfactants such as ammonium lauryl sulfate,ammonium laureth sulfate, sodium lauryl sulfate, sodium laureth sulfate,potassium laureth sulfate, sodium lauryl sarcosinate, sodium lauroylsarcosinate, lauryl sarcosine, cocoyl sarcosine, ammonium cocoylsulfate, potassium lauryl sulfate, and combinations thereof. In oneembodiment, the surfactant comprises sodium laureth(n) sulfate,hereinafter SLEnS, where n defines the average moles of ethoxylation. Inanother embodiment, n ranges from greater than 0 to 8, alternativelyfrom about 1 to about 3, alternatively about 1. It is understood that amaterial such as SLEnS, for example, can comprise a significant amountof molecules which have no ethoxylate, 1 mole ethoxylate, 2 moleethoxylate, 3 mole ethoxylate, and so on in a distribution which can bebroad, narrow or truncated. For example, SLE1S can comprise asignificant amount of molecules which have no ethoxylate, 1 moleethoxylate, 3 mole ethoxylate, and so on in a distribution which can bebroad, narrow or truncated and still comprise SLE1S where the average ofthe distribution is about 1.

The surfactant can also comprises one or more branched anionicsurfactants and monomethyl branched anionic surfactants such as sodiumtrideceth sulfate, sodium tridecyl sulfate, sodium C₁₂₋₁₃ alkyl sulfate,and C₁₂₋₁₃ pareth sulfate and sodium C₁₂₋₁₃ pareth-n sulfate.

Suitable amphoteric or zwitterionic detersive surfactants for use in thepersonal cleansing composition herein include those which are known foruse in personal care cleansing. Concentrations of such amphotericdetersive surfactants range from about 0.5% to about 20%, and from about1% to about 10%. Non limiting examples of suitable zwitterionic oramphoteric surfactants are described in U.S. Pat. No. 5,104,646 (BolichJr. et al.), U.S. Pat. No. 5,106,609 (Bolich Jr. et al.).

Amphoteric surfactant suitable for use in the personal cleansingcomposition described herein include those that are broadly described asderivatives of aliphatic secondary and tertiary amines in which thealiphatic radical can be straight or branched chain and wherein one ofthe aliphatic substituents contains from about 8 to about 18 carbonatoms and one contains an anionic water solubilizing group, e.g.,carboxy, sulfonate, sulfate, phosphate, or phosphonate. Examples ofcompounds falling within this definition include sodium3-dodecyl-aminopropionate, sodium 3-dodecylaminopropane sulfonate,sodium lauryl sarcosinate, N-alkyltaurines such as the one prepared byreacting dodecylamine with sodium isethionate according to the teachingof U.S. Pat. No. 2,658,072, N-higher alkyl aspartic acids such as thoseproduced according to the teaching of U.S. Pat. No. 2,438,091, and theproducts described in U.S. Pat. No. 2,528,378. In an embodiment, thesurfactant included in the personal cleansing composition describedherein can comprise an amphoteric surfactant that is selected from thegroup consisting of sodium lauroamphoacetate, sodium cocoamphoactetate,disodium lauroamphoacetate disodium cocodiamphoacetate, and mixturesthereof.

Zwitterionic surfactants suitable for use in the surfactant of thepersonal cleansing composition described herein include those that arebroadly described as derivatives of aliphatic quaternary ammonium,phosphonium, and sulfonium compounds, in which the aliphatic radicalscan be straight or branched chain, and wherein one of the aliphaticsubstituents contains from about 8 to about 18 carbon atoms and onecontains an anionic group, e.g., carboxy, sulfonate, sulfate, phosphate,or phosphonate. In one embodiment, the zwitterionic surfactant includedin the personal cleansing composition described herein can comprise oneor more betaines such as cocoamidopropyl betaine.

B. Aqueous Carrier

The formulations of the present invention can be in the form of pourableliquids (under ambient conditions). Such compositions will thereforetypically comprise an aqueous carrier, which is present at a level offrom about 20% to about 95%, or even from about 60% to about 85%. Theaqueous carrier may comprise water, or a miscible mixture of water andorganic solvent, and in one aspect may comprise water with minimal or nosignificant concentrations of organic solvent, except as otherwiseincidentally incorporated into the composition as minor ingredients ofother essential or optional components.

The carrier useful in the present invention includes water and watersolutions of lower alkyl alcohols and polyhydric alcohols. The loweralkyl alcohols useful herein are monohydric alcohols having 1 to 6carbons, in one aspect, ethanol and isopropanol. The polyhydric alcoholsuseful herein include propylene glycol, hexylene glycol, glycerin, andpropane diol.

Method of Manufacture

The personal cleansing compositions of the present invention can beprepared by the process comprising: 1) coating a polyacrylatemicrocapsule with an anionic emulsifier to form an anionic polyacrylatemicrocapsule; 2) combining the anionic polyacrylate microcapsule with acationic deposition polymer to form a premix; and 3) adding the premixto a detersive composition comprising surfactant and a carrier.

In another embodiment, the personal cleansing compositions of thepresent invention can be prepared by the process comprising: 1) coatinga polyacrylate microcapsule with an anionic emulsifier to form ananionic polyacrylate microcapsule; 2) combining the anionic polyacrylatemicrocapsule with a cationic deposition polymer to form a premix; 3)adding the premix to a anionic surfactant; and 4) adding the resultingcomposition of step (3) to a detersive composition comprising surfactantand a carrier.

It has been unexpectedly found that the association of anionicpolyacrylate microcapsules combined with cationic deposition polymershas a higher viscoelasticity than in the absence of the mixed componentsthus giving a better adhesion of the anionic microcapsules to the hair.

For example, when an anionic emulsifier comprising a copolymer ofacrylic acid and butyl acrylate (molecular weight of 40,000 g/mol), ismixed with various cationic polymers to form a polymer premix, theresult is a significant increase in viscoelasticity. This increaseindicates a strong polyelectrolyte interaction which is exemplified inthe increase in viscoelastic component G′ as the quantity of cationicpolymer increases (See Table 1)

TABLE 1 Viscoelasticity as a function of anionic:cationic polymer premixratio. Anionic Cationic Anionic Sample Emulsifier Polymer Surfactant G′at 1 Hz G″ at 1 Hz Description (wt %) (wt %) (wt %) (Pascals) (Pascals)1:5 5.10% 25.48% 0.00% 0.369 6.55 Anionic: Cationic 1:10 2.78% 27.79%0.00% 0.178 7.22 Anionic: Cationic 1:20 1.46% 29.12% 0.00% 0.233 7.92Anionic: Cationic

Furthermore, when an anionic surfactant is added to the polymer premix,a substantial increase in viscoelasticity is also noted. Such anincrease in viscoelasticity is influenced by the strength of theassociation between the cationic deposition polymer and the anionicsurfactant. This is exemplified in the increase in viscoelasticcomponent G′ upon addition of anionic surfactant to the premix (SeeTable 2).

TABLE 2 Viscoelasticity as a function of anionic surfactant addition topolymer premix. Anionic Cationic Anionic G′ at 1 Hz G″ at 1 Hz Sample IDEmulsifier Polymer Surfactant (Pascals) (Pascals) 1:5 3.05% 15.25%10.87% 42 105.6 Anionic: Cationic 1:10 1.65% 16.48% 11.74% 37.1 7.1Anionic: Cationic 1:20 0.86% 17.17% 12.23% 118.2 133.9 Anionic: Cationic

In one embodiment of the invention, an anionic emulsifier is covalentlybonded to the outer wall of the polyacrylate microcapsule byincorporating the anionic emulsifier during the microcapsule makingprocess. In another embodiment, the anionic emulsifier is added to theslurry comprising a fully formed polyacrylate microcapsule. Afterforming the anionic polyacrylate microcapsule through either step, acationic deposition polymer is then added to the anionic microcapsule toform a viscoelastic premix. When this premix is then combined with ananionic surfactant, an association of polymers forms a microstructure onthe anionic polyacrylate microcapsule wall. The microstructure formseven upon dilution of the personal cleansing composition. Once formed,the high viscosity of the polymer association microstructure results inan anionic polyacrylate microcapsule that maintains its microcapsulestructure even upon dilution of the personal cleansing composition. Inaddition, the microcapsule structure provides multiple points of contactto the substrate which works to increase the amount of time themicrocapsule is on the situs.

The polyacrylate microcapsules of the present invention can beformulated into any suitable form and prepared by any process chosen bythe formulator, non-limiting examples of which are described in U.S.Pat. No. 5,879,584; U.S. Pat. No. 5,691,297; U.S. Pat. No. 5,574,005;U.S. Pat. No. 5,569,645; U.S. Pat. No. 5,565,422; U.S. Pat. No.5,516,448; U.S. Pat. No. 5,489,392; U.S. Pat. No. 5,486,303 all of whichare incorporated herein by reference.

Product Forms

The personal cleansing compositions of the present invention can be inthe form of rinse-off products or leave-on products, and can beformulated in a wide variety of product forms, including but not limitedto creams, gels, emulsions, mousses and sprays.

In one embodiment, the personal cleansing composition is in the form ofa gel comprising less than about 45% water. In such embodiment, the gelmay have a neat viscosity of about 1,000 cps to about 10,000 cps. Theneat viscosity of a gel can be defined as the viscosity of the fluid ata shear rate of 1/sec. Scientifically, viscosity is the ratio of shearstress to shear rate. In some embodiments, the range of shear rates forgels is from 0.01/sec to 10/sec.

Neat viscosity of the gel product form can be measured with a rheometeraccording to the following method:

-   -   (1) Load the sample onto the plate.    -   (2) Establish a gap of 1 millimeter between the 1 degree cone        and the plate.    -   (3) Perform a shear sweep on the fluid from 0.01/sec to 10/sec.    -   (4) Record the shear stress response of the fluid.    -   (5) Determine the neat viscosity of the fluid by calculating the        ratio of shear stress to shear rate at each shear rate.

As noted herein, the personal cleansing composition may include astructured cleansing phase and a benefit phase. In one embodiment, thestructured cleansing phase and the benefit phase can be in physicalcontact. In one embodiment, the personal cleansing composition can be amultiphase personal cleansing composition where the structured cleansingphase and the benefit phase can be blended or mixed to a significantdegree, but still be physically distinct such that the physicaldistinctiveness is undetectable to the naked eye.

In certain embodiments, the personal cleansing composition can be amultiphase personal cleansing composition where the structured cleansingphase and the benefit phase can be made to occupy separate but distinctphysical spaces inside a package in which the phases can be stored. Insuch an embodiment, the structured cleansing phase and the benefit phasecan be stored such that the phases are not in direct contact with oneanother. In another embodiment, the personal cleansing composition canbe a multiphase personal cleansing composition where the structuredcleansing phase and the benefit phase are in physical contact and canhave a striped or marbled configuration.

In yet another embodiment, the personal cleansing composition caninclude a combination of one or more of the above multiphase personalcleansing compositions. In one such embodiment, one blended multiphasepersonal cleansing composition can be stacked as stripes with anotherblended multiphase personal cleansing composition. And in another suchembodiment, blended multiphase personal cleansing compositionsdistinguishable by color can be stacked as stripes wherein the blendedmultiphase personal cleansing compositions can be otherwise similar.

Test Methods

It is understood that the test methods that are disclosed in the TestMethods Section of the present application should be used to determinethe respective values of the parameters of Applicants' invention as suchinvention is described and claimed herein.

A. C log P

The “calculated log P” (C log P) is determined by the fragment approachof Hansch and Leo (cf., A. Leo, in Comprehensive Medicinal Chemistry,Vol. 4, C. Hansch, P. G. Sammens, J. B. Taylor, and C. A. Ramsden, Eds.P. 295, Pergamon Press, 1990, incorporated herein by reference). C log Pvalues may be calculated by using the “C LOG P” program available fromDaylight Chemical Information Systems Inc. of Irvine, Calif. U.S.A.

B. Boiling Point

Boiling point is measured by ASTM method D2887-04a, “Standard TestMethod for Boiling Range Distribution of Petroleum Fractions by GasChromatography,” ASTM International.

C. Median Particle Size

Particle size is measured using an Accusizer 780A, made by ParticleSizing Systems, Santa Barbara Calif. The instrument is calibrated from 0to 300μ using Duke particle size standards. Samples for particle sizeevaluation are prepared by diluting about 1 g of capsule slurry in about5 g of de-ionized water and further diluting about 1 g of this solutionin about 25 g of water.

About 1 g of the most dilute sample is added to the Accusizer and thetesting initiated, using the autodilution feature. The Accusizer shouldbe reading in excess of 9200 counts/second. If the counts are less than9200 additional sample should be added. The accusizer will dilute thetest sample until 9200 counts/second and initiate the evaluation. After2 minutes of testing the Accusizer will display the results, includingvolume-weighted median size.

The broadness index can be calculated by determining the particle sizeat which 95% of the cumulative particle volume is exceeded (95% size),the particle size at which 5% of the cumulative particle volume isexceeded (5% size), and the median volume-weighted particle size (50%size—50% of the particle volume both above and below this size).Broadness Index (5)=((95% size)−(5% size)/50% size).

D. Fracture Strength Test Method

Analysis steps include:

a.) Place 1 gram of particles in 1 liter of distilled deionized (DI)water.

b.) Permit the particles to remain in the DI water for 10 minutes andthen recover the particles by filtration, using a 60 mL syringe filter,1.2 micron nitrocellulose filter (Millipore, 25 mm diameter).

c.) Determine the rupture force of 50 individual particles. The ruptureforce of a particle is determined using the procedure given in Zhang,Z.; Sun, G; “Mechanical Properties of Melamine-Formaldehydemicrocapsules,” J. Microencapsulation, vol 18, no. 5, pages 593-602,2001. Then calculate the fracture strength of each particle by dividingthe rupture force (in Newtons) by the cross-sectional area of therespective spherical particle (πr², where r is the radius of theparticle before compression), said cross-sectional area being determinedas follows: measuring the particle size of each individual particleusing the experimental apparatus and method of Zhang, Z.; Sun, G;“Mechanical Properties of Melamine-Formaldehyde microcapsules,” J.Microencapsulation, vol 18, no. 5, pages 593-602, 2001.

d.) Use the 50 independent measurements from c.) above, and calculatethe percentage of particles having a fracture strength within theclaimed range fracture strength range.

E. Zeta Potential

-   -   (1) Equipment specifications: Malvern Zeatasizer Nano Model        ZEN3600 Sample cell, disposable capillary cell (green cell)    -   (2) Use Duke standards to measure the PSD, and use it to measure        the zeta potential to assure that the instrument is functioning        properly.    -   (3) Flush a DTS1060 capillary cell with 1-2 mL ethanol, the with        DI water to prepare the capillary cell.    -   (4) Sample preparation: first, filter 20 mL DI water through 0.2        micron filter into a 20 mL vial. Add 1 drop (50 microliters of        30 wt % solids particular suspension into the vial and invert        the sample back and forth gently until the particulate        suspension is homogeneously dispersed in the vial. Next, rinse a        DTS1060 green disposable zeta cell with 1-2 mL of DI water, then        use a syringe to transfer the sample solution from the vial into        the zeta cell, making sure that no air bubbles are present in        the cell. Fill the cell to the top, then place a cap on the cell        outlet and inlet (again making sure no air bubbles are present        in the sample cell). Then, place the cell in the sample chamber,        with the electrodes facing the sides of the system. Finally,        place the sample cell in the instrument.    -   (5) Conditions for the run:        -   a. Refractive index=1.35 (this number may vary for            suspensions. One can measure the refractive index for any            particulate suspension using a refractometer)        -   b. Temperature=25 degrees Centigrade        -   c. Equilibration time=1 minute        -   d. Smoluchowski model to be used to calculate the zeta            potential    -   (6) Measure each sample in triplicate. The result from the        instrument is reported as Zeta Potential in milliVolts, with no        extrapolation.

EXAMPLES

While particular embodiments of the present invention have beenillustrated and described, it would be obvious to those skilled in theart that various other changes and modifications can be made withoutdeparting from the spirit and scope of the invention. It is thereforeintended to cover in the appended claims all such changes andmodifications that are within the scope of this invention.

A perfume composition, called Scent A, is utilized to prepare theexamples of the invention. The table below lists the ingredients, andtheir properties. Table 2 provides the C log P breakdown of the perfumeoil composition.

TABLE 1 Material Name ClogP Boiling Point ° C. Beta Gamma Hexenol 1.3155 Phenyl Ethyl Alcohol 1.32 219 Helional 1.77 329 Triplal Extra 1.78199 Amyl-Acetate (isomer Blends) 1.87 135 Melonal 2.09 182 Liffarome2.14 167 Iso Eugenol Acetate 2.17 303 Cis 3 Hexenyl Acetate 2.18 167Jasmolactone 2.36 219 2′6-nonadien-1-ol 2.43 213 Florosa 2.46 238Nonalactone 2.66 193 Cis Jasmone 2.81 254 Ethyl Linalool 2.92 223 PinoAcetaldehyde 2.98 261 Methyl Dihydro Jasmonate 3.01 323 Undecavertol3.06 242 Azurone 10/tec 0015573 3.06 395 Dihydro Myrcenol 3.08 195Cyclemax 3.23 281 Hivernal 3.29 351 Pomarose 3.51 214 Undecalactone 3.75228 Damascenone Total 937459 3.89 267 Acalea (01-1963) 3.9 344Cis-3-hexenyl Salicylate 4 316 Ionone Beta 4.02 267 Polysantol 4.21 256Ambroxan 4.58 285 5-cyclohexadecen-1-one 5.04 331 Iso E Super Or Wood5.05 325 Laevo Muscone 5.48 321 Helvetolide 947650 5.56 309

Example 1 Nonionic Microcapsule (TAS0810101, MVF1837-94B)

An oil solution, consisting of 75 g Fragrance Oil scenta, 75 g ofIsopropyl Myristate, 0.6 g DuPont Vazo-52, and 0.4 g DuPont Vazo-67, isadded to a 35° C. temperature controlled steel jacketed reactor, withmixing at 1000 rpm (4 tip, 2″ diameter, flat mill blade) and a nitrogenblanket applied at 100 cc/min. The oil solution is heated to 75° C. in45 minutes, held at 75° C. for 45 minutes, and cooled to 60° C. in 75minutes.

A second oil solution, consisting of 37.5 g Fragrance Oil, 0.5 gtertiarybutylaminoethyl methacrylate, 0.4 g 2-carboxyethyl acrylate, and20 g Sartomer CN975 (hexafunctional urethane-acrylate oligomer) is addedwhen the first oil solution reached 60° C. The combined oils are held at60° C. for an additional 10 minutes.

Mixing is stopped and a water solution, consisting of 56 g of 5% activepolyvinyl alcohol Celvol 540 solution in water, 244 g water, 1.1 g 20%NaOH, and 1.2 g DuPont Vazo-68WSP, is added to the bottom of the oilsolution, using a funnel.

Mixing is again started, at 2500 rpm, for 60 minutes to emulsify the oilphase into the water solution. After milling is completed, mixing iscontinued with a 3″ propeller at 350 rpm. The batch is held at 60° C.for 45 minutes, the temperature is increased to 75° C. in 30 minutes,held at 75° C. for 4 hours, heated to 90° C. in 30 minutes and held at90° C. for 8 hours. The batch is then allowed to cool to roomtemperature. The finished microcapsules have a median particle size of6.4 microns, a broadness index of 1.3, and a zeta potential of negative0.5 millivolts, and a total scent A concentration of 27.6 wt %.

Example 2 Anionic Microcapsule, Large Particle Size (TAS1122101)

Capsules are made using identical materials, compositions, and processconditions as in Example 1 with the following exceptions: 1 gram ofVazo-52, 0.8 grams of Vazo-67, 0.3 grams of tertiarybutylaminoethylmethacrylate, 0.25 grams of 2-carboxyethyl acrylate, and 12 grams ofSartomer CN975 as compositional differences in the oil phase; and 22grams of 25% active Colloid 351, and 308 grams of water as compositionaldifferences in the water phase. All other mixing and process conditionerremains the same. The finished microcapsules have a median particle sizeof 10.7 microns, a broadness index of 1.5, and a zeta potential ofnegative 60 milivolts, and a total scent A concentration of 34.9 wt %.

Example 3 Anionic Microcapsule, Small Particle Size (TAS1123101)

Capsules are made using identical materials, compositions, and processconditions as in Example 1 with the following exceptions: 1 gram ofVazo-52, 0.8 grams of Vazo-67, 1.5 grams of tertiarybutylaminoethylmethacrylate, 1.2 grams of 2-carboxyethyl acrylate, and 60 grams ofSartomer CN975 as compositional differences in the oil phase; and 68grams of 25% active Colloid 351, and 282 grams of water as compositionaldifferences in the water phase. All other mixing and process conditionerremains the same. The finished microcapsules have a median particle sizeof 1.4 microns, a broadness index of 1.2, and a zeta potential ofnegative 60 milivolts, and a total scent A concentration of 20.7 wt %.

Example 4 Anionic Microcapsule (TAS1101101)

Capsules are made using identical materials, compositions, and processconditions as in Example 2 with the following exceptions: 1 gram oftertiarybutylaminoethyl methacrylate, 0.8 grams of 2-carboxyethylacrylate, and 40 grams of Sartomer CN975 as compositional differences inthe oil phase; and 22 grams of 25% active Colloid 351, and 282 grams ofwater as compositional differences in the water phase. All other mixingand process conditioners remain the same.

The finished microcapsules have a median particle size of 4.8 microns, abroadness index of 1.3, and a zeta potential of negative 60 milivolts,and a total scent A concentration of 23.5 wt %.

Example 5 Body Cleansing Composition

The microcapsules of Example 1, 2, and 4 are formulated into a bodycleansing composition. The anionic microcapsules of example 2 and 4 arefirst mixed with a 15 wt % solution of tapioca starch (Akzo) to form aviscoelastic mixture:

Micro- 15% Tapioca capsules Microcapsule Starch Solution Water FinalPerfume of Example (g) (g) (g) Content wt % 2 4.1 2.38 3.52 14.31%(Premix 2) 4 6.09 2.38 1.53 14.31% (Premix 4)This premix is then added to the body cleansing composition below, mixedat 1900 RPM for 1 minute using a DAFC 400FVZ speed mixer.

Example Example Example Example 5A 5B 5C 5D I: Cleansing PhaseComposition Sodium Trideceth Sulfate 5.9 5.9 5.9 5.9 (sulfated fromIconol TDA-3 (BASF Corp.) to >95% sulfate) Sodium Lauryl Sulfate 5.9 5.95.9 5.9 (Procter and Gamble) Sodium Lauroamphoacetate 3.6 3.6 3.6 3.6(Cognis Chemical Corp.,) Guar Hydroxypropyltrimonium 0.3 0.3 0.7 0.7Chloride (N-Hance 3196 from Aqualon) Stabylen 30 0.33 0.33 0.33 0.33(Acrylates/Vinyl Isodecanoate, 3V) Sodium Chloride 3.75 3.75 3.75 3.75Trideceth-3 1.75 1.75 1.75 1.75 (Iconal TDA-3 from BASF Corp.) Methylchloro isothiazolinone and 0.033 0.033 0.033 0.033 methylisothiazolinone (Kathon CG, Rohm & Haas) EDTA (Dissolvine NA 2x) 0.150.15 0.15 0.15 Sodium Benzoate 0.2 0.2 0.2 0.2 Citric Acid, titrate pH =5.7 ± 0.2 pH = 5.7 ± 0.2 pH = 5.7 ± 0.2 pH = 5.7 ± 0.2 Scent A 0.4 0.00.0 0.0 Perfume Microcapsule Example None 1 Premix 2 Premix 4Polyacrylate Microcapsule Premix 0 1.45 1.40 1.40 (0.4% perfume usagelevel) Water and Minors (NaOH) Q.S. Q.S. Q.S. Q.S. II: Benefit PhaseComposition Petrolatum 70 70 70 70 (G2218 from Sonnerbonn) Mineral Oil30 30 30 30 (Hydrobrite 1000 from Sonnerbonn) III: SurfactantPhase:Benefit 50:50 50:50 50:50 50:50 Phase Blending RatioEach product above is tested for olfactive performance on a forearm,using the following protocol:

-   -   Saturate puff under running water for 5 seconds. (95 deg. F+/−5        deg. F.; ˜1.8 L/min)    -   Wet forearm under running water for 5 seconds, elbow to wrist.    -   Dispense 1 mL product(s) into opposite palm.    -   Rub product on application arm for 5 seconds. Rub palm along the        edge of arm to remove excess from palm.    -   Do NOT rewet puff. LIGHTLY wash the inner forearm for 10 seconds        in long, circular strokes. It should foam, if it's streaking,        lighten pressure.    -   Allow 15 second residence time.    -   Rinse forearm with running water for 15 seconds.    -   Dry with clean paper towels by laying paper towel on lower arm        and walking opposite hand along full, inner arm (elbow to        wrist), no rubbing.    -   Perform no measurements for at least 30 seconds, leaving arm        open to air during this time.    -   Evaluate the olfactive performance of the arm before rubbing and        after rubbing, for different periods of aging the arm (and        exposing to ambient air).        Intensity Scale 1-100 (No Odor-Most Intense Possible)

Initial Dry 4 hr 6 hr 8 hr During Pre-rub/ Pre-rub/ Pre-rub/ Pre-rub/Example Use/Lather Post-rub Post-rub Post-rub Post-rub 5A 75 70/70 50/5040/40 30/30 5B 75 70/70 50/50 40/40 30/30 5C 70 65/70 50/65 40/50 30/405D 70  65/65+  50/60+ 40/50 30/40Notice the much higher intensity of fragrance is detected at eachfragrance longevity time point (vs. control 4A) when premixes of anionicmicrocapsule and cationic polymer are added to the body cleansingcomposition.

The dimensions and values disclosed herein are not to be understood asbeing strictly limited to the exact numerical values recited. Instead,unless otherwise specified, each such dimension is intended to mean boththe recited value and a functionally equivalent range surrounding thatvalue. For example, a dimension disclosed as “40 mm” is intended to mean“about 40 mm.”

Every document cited herein, including any cross referenced or relatedpatent or application, is hereby incorporated herein by reference in itsentirety unless expressly excluded or otherwise limited. The citation ofany document is not an admission that it is prior art with respect toany invention disclosed or claimed herein or that it alone, or in anycombination with any other reference or references, teaches, suggests ordiscloses any such invention. Further, to the extent that any meaning ordefinition of a term in this document conflicts with any meaning ordefinition of the same term in a document incorporated by reference, themeaning or definition assigned to that term in this document shallgovern.

While particular embodiments of the present invention have beenillustrated and described, it would be obvious to those skilled in theart that various other changes and modifications can be made withoutdeparting from the spirit and scope of the invention. It is thereforeintended to cover in the appended claims all such changes andmodifications that are within the scope of this invention.

What is claimed is:
 1. A personal cleansing composition comprising: (a)a premix, the premix comprising from about 0.001% to about 10%, byweight of the personal cleansing composition, of an anionic chargedpolyacrylate microcapsule and from about 0.01% to about 2% of a cationicdeposition polymer; (b) from about 2% to about 50% of a detersivesurfactant; and (c) a carrier.
 2. The personal cleansing composition ofclaim 1, wherein the anionic charged polyacrylate microcapsule comprisesan anionic emulsifier and a polyacrylate microcapsule.
 3. The personalcleansing composition of claim 2, wherein the anionic emulsifiersurrounds at least a part of the external surface of the polyacrylatemicrocapsule, or is physically or chemically bound to the externalsurface of the polyacrylate microcapsule.
 4. The personal cleansingcomposition of claim 2, wherein the anionic emulsifier and thepolyacrylate microcapsule are mixed such that the weight ratio of theanionic emulsifier to the polyacrylate microcapsule is from about 1.0:40to about 0.5:5.
 5. The personal cleansing composition of claim 1,wherein the anionic charged polyacrylate microcapsule and the cationicdeposition polymer are mixed such that the weight ratio of the anioniccharged polyacrylate microcapsule to the cationic deposition polymer isfrom about 1.0:0.01 to about 1.0:10.
 6. The personal cleansingcomposition of claim 2, wherein the anionic emulsifier is selected fromthe group consisting of: poly(meth)acrylic acid; copolymers of(meth)acrylic acids and its (meth)acrylates with C1-C22 alkyl;copolymers of (meth)acrylic acids and (meth)acrylamide; and mixturesthereof.
 7. The personal cleansing composition of claim 1, wherein theanionic charged polyacrylate microcapsule has a particle size of fromabout 2 microns to about 80 microns.
 8. The personal cleansingcomposition of claim 2, wherein the polyacrylate microcapsule has a coreand a shell that encapsulates said core.
 9. The personal cleansingcomposition of claim 8, wherein the core comprises from about 6% toabout 99.9% of a benefit agent.
 10. The personal cleansing compositionof claim 9, wherein the benefit agent is selected from the groupconsisting of perfumes; brighteners; enzymes; skin care agents,moisturizers, thickeners; anti-microbial agents and mixtures thereof.11. The personal cleansing composition of claim 1, wherein the cationicdeposition polymer is selected from the group consisting of starches,guar, cellulose, cassia, locust bean, Konjac, Tara, galactomanna,hydroxypropyltrimonium chloride modified guar guam, polyDADMAC, tapiocastarch, and polyTriquat.
 12. The personal cleansing composition of claim1, wherein the cationic deposition polymer is a water-soluble polymerwith a charge density of from about 0.5 milliequivalents per gram toabout 12 milliequivalents per gram, and wherein the cationic depositionpolymer has a molecular weight of about 100,000 Daltons to about5,000,000 Daltons.
 13. The personal cleansing composition of claim 1,wherein the detersive surfactant is anionic, nonionic, cationic,zwitterionic, amphoteric, soap, or combinations thereof.
 14. Thepersonal cleansing composition of claim 1, wherein the carrier compriseswater and water solutions of lower alkyl alcohols and polyhydricalcohols.
 15. The personal cleansing composition of claim 1, wherein theanionic charged polyacrylate microcapsule is contained in anagglomerate, and wherein the agglomerate comprises materials selectedfrom the group consisting of silicas, citric acid, sodium carbonate,sodium sulfate, sodium chloride, and binders such as sodium silicates,modified celluloses, polyethylene glycols, polyacrylates, polyacrylicacids, zeolites, and mixtures thereof.
 16. The personal cleansingcomposition of claim 1, wherein the personal cleansing composition is inthe form of a gel, and wherein the gel comprises less than about 45%water.
 17. The personal cleansing composition of claim 2, wherein theanionic emulsifier and the polyacrylate microcapsule are mixed such thatthe weight ratio of the anionic emulsifier to the polyacrylatemicrocapsule is from about 1.0:200 to about 1:20.
 18. The personalcleansing composition of claim 2, wherein the anionic emulsifier and thepolyacrylate microcapsule are mixed such that the weight ratio of theanionic emulsifier to the polyacrylate microcapsule is from about1.0:1000 to about 2:5.
 19. The personal cleansing composition of claim2, wherein the anionic emulsifier is selected from the group consistingof: carboxyvinylpolymer; acrylate copolymers; Acrylic acid/vinyl estercopolymer/Acrylates/Vinyl Isodecanoate crosspolymer;Acrylates/Palmeth-25 Acrylate copolymer; Acrylate/Steareth-20 Itaconatecopolymer; Acrylate/Celeth-20 Itaconate copolymer; Polystyrenesulphonate; copolymers of methacrylic acid and acrylamidomethylpropanesulfonic acid; copolymers of acrylic acid and acrylamidomethylpropanesulfonic acid; carboxymethycellulose; carboxy guar; copolymers ofethylene and maleic acid; acrylate silicone polymer; and mixturesthereof.
 20. A personal cleansing composition comprising: a premix, thepremix comprising from about 0.001% to about 10% of an anionicpolyacrylate microcapsule and from about 0.01% to about 2% of a cationicdeposition polymer; from about 2% to about 50% of a detersivesurfactant; and a carrier; wherein said anionic polyacrylatemicrocapsule comprises an oil soluble or dispersible core material and awall material at least partially surrounding the core material, themicrocapsule wall material comprising: the reaction product of a firstcomposition in the presence of a second composition comprising ananionic emulsifier, the first composition comprising a reaction productof i) an oil soluble or dispersible amine with ii) a multifunctionalacrylate or methacrylate monomer or oligomer, an oil soluble acid and aninitiator, the anionic emulsifier comprising a water soluble or waterdispersible acrylic acid alkyl acid copolymer, an alkali or alkali salt,and optionally a water phase initiator, whereby the reaction product ofthe first composition and second composition results in the formation ofmicrocapsules.